OMAPL138如何在Linux下使用EDMA3驱动

yyj

4 o/ d5 t2 T/ Y3 f* I

1. [code]EDMA sample test application
   7 k! n- m5 A6 ?- J( u' a  h
2. /*
   0 U( g# k3 K! J9 P& t! `
3. * edma_test.c
   
4. *
   9 ]0 K, g- l% @* M$ U! N
5. * brief  EDMA3 Test Application
   $ j# v! _; x3 d" D( F, t: A7 X
6. *
   9 W! z- z' k2 P0 d
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    % |8 \8 e' ^* H$ Q9 x6 s
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    % T. H5 b! N6 m& w. a. d
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    . Y$ `6 H1 k+ O( L5 ]! u  [
18. *
    0 y5 A" T/ u; O0 n
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ' I0 T6 ?) u# m* |
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    # d0 ^/ x  v  k  H) ~. U
28. #include <linux/types.h>
    - w8 I3 @5 G6 ^: z
29. #include <linux/interrupt.h>
    9 D2 S; E3 e+ E1 i7 j4 g
30. #include <asm/io.h>
    " v. ^5 c. m$ C) G
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
      b/ H  X, h2 A, x% Y
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    & n( t6 `) i- d' Q/ P# y
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    , m6 X$ Q5 ]0 r) o! S& K
40. 
    
41. #undef EDMA3_DEBUG
    2 x; @- @7 F5 s2 v) e
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    4 M6 _- K6 B  @, a$ Y
48. #else
      t4 f( W- C+ L$ X1 Q
49. #define DMA_PRINTK( x... )
    . R1 _% m1 Z0 G4 y/ ]
50. #define DMA_FN_IN
    1 \- H9 Z5 I7 s' ~
51. #define DMA_FN_OUT
    
52. #endif
    , Q, b5 b; s/ Y6 [: k
53. 
    2 ~5 ^8 f5 D2 R# @% O5 ?1 m0 O$ h- t
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    ) Y. c) ~) p- N' G) [: I
56. #define TCINTEN_SHIFT               20
    4 t' J) v1 W% N+ L
57. #define ITCINTEN_SHIFT              21
    / F: Z- L( S4 W1 Z: a4 m, L  s
58. #define TCCHEN_SHIFT                22
    9 o1 u( K# [# e! m' O6 u
59. #define ITCCHEN_SHIFT               23
    ) D) i2 u! c# U! g" T2 p
60. 
    " G+ E3 B5 ^: l3 K4 O
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ) F( \0 o4 H# K& E5 ]- N4 U
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    " P. [: m# `/ P3 w
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    . U. s) Y5 E% q& ?& F
67. 
    ; ^8 I$ l6 R" L0 d5 j
68. dma_addr_t dmaphyssrc1 = 0;
    8 M( q8 u+ |1 n, f
69. dma_addr_t dmaphyssrc2 = 0;
    : l* C) P, u- j% Q% h
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    1 ~+ ~2 X1 @7 |* x1 T
72. 
    + y, ]) }" M- s! j3 ?
73. char *dmabufsrc1 = NULL;
    $ h6 ]( |0 ^8 @5 R& x9 f+ {* V
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    ; w3 s. Q6 A, D. \. b& B' h% `% t, K
76. char *dmabufdest2 = NULL;
    
77. 
    " p7 }! S  X- |7 j1 }" c5 d
78. static int acnt = 512;
    
79. static int bcnt = 8;
    ' A' {2 R: C! U1 B1 F# w9 Y
80. static int ccnt = 8;
    # y( B" f; |. J( B" W" ^
81. 
    ' ], ?/ u+ s- ?2 P
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

0 V6 f! \( a; M# Z
6 v$ O, Y# H! q, r2 i! M" m* x      这是在TI上找到的一个针对Davanci处理器简单的EDMA3驱动程序测试例程的一部分，我在编译的过程中是用
arm-none-linux-gnueabi-gcc  -I /home/tl/omapl138/linux-3.3/arch/arm/include -I /home/tl/omapl138/linux-3.3/include  EDMA3test.cpp -o EDMA3这个命令来链接库文件进行编译，但是报的错误特别多，我又试着一个函数一个函数往进加，仍然是很多错误。
" N8 G6 `5 v; e& Z$ J- d     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
7 R# d, l; [% n% X9 s3 ~7 O% }

& I3 P& h7 \3 {( c' z8 v4 o* w0 z